[alsa-devel] [PATCH RFC 3/5] ALSA: intel8x0: Allocate resources with device-managed APIs
Takashi Iwai
tiwai at suse.de
Thu Sep 13 08:05:25 CEST 2018
This patch refactors the intel8x0 and intel8x0m driver codes using
devres and gets rid of the driver remove callback.
The conversion is fairly straightforward: each API call is replaced
with the device-managed API function, e.g. pci_enable_device() ->
pcim_enable_device(), and so on. The buffer descriptor list is
allocated with a new API, snd_devm_alloc_pages().
A slight code structure change is that the intel8x0 object is
allocated as a card's private_data instead of the own lowlevel
snd_device object. This simplifies the resource management.
And, the take-down procedure is triggered via card->private_free, and
it's registered at the end of the whole initialization, i.e. after the
all resources get properly managed.
The only not-devres-managed resource is the irq handler. Since we
need to release at suspend and re-acquire at resume (otherwise
something weird happens on some machines), this is still managed
manually. But the rest are all freed automatically.
The end result is a good amount of code reduction.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
sound/pci/intel8x0.c | 143 ++++++++++++++----------------------------
sound/pci/intel8x0m.c | 143 ++++++++++++++----------------------------
2 files changed, 92 insertions(+), 194 deletions(-)
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index 9517f9b8f1d4..662d5c9109f5 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -415,7 +415,7 @@ struct intel8x0 {
spinlock_t reg_lock;
u32 bdbars_count;
- struct snd_dma_buffer bdbars;
+ struct snd_dma_buffer *bdbars;
u32 int_sta_reg; /* interrupt status register */
u32 int_sta_mask; /* interrupt status mask */
};
@@ -2567,8 +2567,9 @@ static int snd_intel8x0_chip_init(struct intel8x0 *chip, int probing)
return 0;
}
-static int snd_intel8x0_free(struct intel8x0 *chip)
+static void snd_intel8x0_free(struct snd_card *card)
{
+ struct intel8x0 *chip = card->private_data;
unsigned int i;
if (chip->irq < 0)
@@ -2591,16 +2592,6 @@ static int snd_intel8x0_free(struct intel8x0 *chip)
__hw_end:
if (chip->irq >= 0)
free_irq(chip->irq, chip);
- if (chip->bdbars.area)
- snd_dma_free_pages(&chip->bdbars);
- if (chip->addr)
- pci_iounmap(chip->pci, chip->addr);
- if (chip->bmaddr)
- pci_iounmap(chip->pci, chip->bmaddr);
- pci_release_regions(chip->pci);
- pci_disable_device(chip->pci);
- kfree(chip);
- return 0;
}
#ifdef CONFIG_PM_SLEEP
@@ -2871,12 +2862,6 @@ static void snd_intel8x0_proc_init(struct intel8x0 *chip)
snd_info_set_text_ops(entry, chip, snd_intel8x0_proc_read);
}
-static int snd_intel8x0_dev_free(struct snd_device *device)
-{
- struct intel8x0 *chip = device->device_data;
- return snd_intel8x0_free(chip);
-}
-
struct ich_reg_info {
unsigned int int_sta_mask;
unsigned int offset;
@@ -2920,19 +2905,15 @@ static int snd_intel8x0_inside_vm(struct pci_dev *pci)
return result;
}
-static int snd_intel8x0_create(struct snd_card *card,
- struct pci_dev *pci,
- unsigned long device_type,
- struct intel8x0 **r_intel8x0)
+static int snd_intel8x0_init(struct snd_card *card,
+ struct pci_dev *pci,
+ unsigned long device_type)
{
- struct intel8x0 *chip;
+ struct intel8x0 *chip = card->private_data;
int err;
unsigned int i;
unsigned int int_sta_masks;
struct ichdev *ichdev;
- static struct snd_device_ops ops = {
- .dev_free = snd_intel8x0_dev_free,
- };
static unsigned int bdbars[] = {
3, /* DEVICE_INTEL */
@@ -2965,16 +2946,10 @@ static int snd_intel8x0_create(struct snd_card *card,
};
struct ich_reg_info *tbl;
- *r_intel8x0 = NULL;
-
- if ((err = pci_enable_device(pci)) < 0)
+ err = pcim_enable_device(pci);
+ if (err < 0)
return err;
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
- if (chip == NULL) {
- pci_disable_device(pci);
- return -ENOMEM;
- }
spin_lock_init(&chip->reg_lock);
chip->device_type = device_type;
chip->card = card;
@@ -2999,38 +2974,24 @@ static int snd_intel8x0_create(struct snd_card *card,
pci->device == PCI_DEVICE_ID_INTEL_440MX)
chip->fix_nocache = 1; /* enable workaround */
- if ((err = pci_request_regions(pci, card->shortname)) < 0) {
- kfree(chip);
- pci_disable_device(pci);
+ err = pcim_iomap_regions(pci, -1, card->shortname);
+ if (err < 0)
return err;
- }
if (device_type == DEVICE_ALI) {
/* ALI5455 has no ac97 region */
- chip->bmaddr = pci_iomap(pci, 0, 0);
- goto port_inited;
- }
-
- if (pci_resource_flags(pci, 2) & IORESOURCE_MEM) /* ICH4 and Nforce */
- chip->addr = pci_iomap(pci, 2, 0);
- else
- chip->addr = pci_iomap(pci, 0, 0);
- if (!chip->addr) {
- dev_err(card->dev, "AC'97 space ioremap problem\n");
- snd_intel8x0_free(chip);
- return -EIO;
+ chip->bmaddr = pcim_iomap_table(pci)[0];
+ } else {
+ if (pci_resource_flags(pci, 2) & IORESOURCE_MEM) /* ICH4 and Nforce */
+ chip->addr = pcim_iomap_table(pci)[2];
+ else
+ chip->addr = pcim_iomap_table(pci)[0];
+ if (pci_resource_flags(pci, 3) & IORESOURCE_MEM) /* ICH4 */
+ chip->bmaddr = pcim_iomap_table(pci)[3];
+ else
+ chip->bmaddr = pcim_iomap_table(pci)[1];
}
- if (pci_resource_flags(pci, 3) & IORESOURCE_MEM) /* ICH4 */
- chip->bmaddr = pci_iomap(pci, 3, 0);
- else
- chip->bmaddr = pci_iomap(pci, 1, 0);
- port_inited:
- if (!chip->bmaddr) {
- dev_err(card->dev, "Controller space ioremap problem\n");
- snd_intel8x0_free(chip);
- return -EIO;
- }
chip->bdbars_count = bdbars[device_type];
/* initialize offsets */
@@ -3066,10 +3027,10 @@ static int snd_intel8x0_create(struct snd_card *card,
/* allocate buffer descriptor lists */
/* the start of each lists must be aligned to 8 bytes */
- if (snd_dma_alloc_pages(intel8x0_dma_type(chip), snd_dma_pci_data(pci),
- chip->bdbars_count * sizeof(u32) * ICH_MAX_FRAGS * 2,
- &chip->bdbars) < 0) {
- snd_intel8x0_free(chip);
+ chip->bdbars = snd_devm_alloc_pages(&pci->dev, intel8x0_dma_type(chip),
+ chip->bdbars_count * sizeof(u32) *
+ ICH_MAX_FRAGS * 2);
+ if (IS_ERR(chip->bdbars)) {
dev_err(card->dev, "cannot allocate buffer descriptors\n");
return -ENOMEM;
}
@@ -3078,9 +3039,9 @@ static int snd_intel8x0_create(struct snd_card *card,
int_sta_masks = 0;
for (i = 0; i < chip->bdbars_count; i++) {
ichdev = &chip->ichd[i];
- ichdev->bdbar = ((__le32 *)chip->bdbars.area) +
+ ichdev->bdbar = ((__le32 *)chip->bdbars->area) +
(i * ICH_MAX_FRAGS * 2);
- ichdev->bdbar_addr = chip->bdbars.addr +
+ ichdev->bdbar_addr = chip->bdbars->addr +
(i * sizeof(u32) * ICH_MAX_FRAGS * 2);
int_sta_masks |= ichdev->int_sta_mask;
}
@@ -3113,26 +3074,23 @@ static int snd_intel8x0_create(struct snd_card *card,
for (i = 0; i < chip->max_codecs; i++)
chip->codec_isr_bits |= chip->codec_bit[i];
- if ((err = snd_intel8x0_chip_init(chip, 1)) < 0) {
- snd_intel8x0_free(chip);
+ err = snd_intel8x0_chip_init(chip, 1);
+ if (err < 0)
return err;
- }
/* request irq after initializaing int_sta_mask, etc */
+ /* NOTE: we don't use devm version here since it's released /
+ * re-acquired in PM callbacks.
+ * It's released explicitly in snd_intel8x0_free(), too.
+ */
if (request_irq(pci->irq, snd_intel8x0_interrupt,
IRQF_SHARED, KBUILD_MODNAME, chip)) {
dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
- snd_intel8x0_free(chip);
return -EBUSY;
}
chip->irq = pci->irq;
+ card->private_free = snd_intel8x0_free;
- if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
- snd_intel8x0_free(chip);
- return err;
- }
-
- *r_intel8x0 = chip;
return 0;
}
@@ -3198,9 +3156,11 @@ static int snd_intel8x0_probe(struct pci_dev *pci,
int err;
struct shortname_table *name;
- err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
+ err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,
+ sizeof(*chip), &card);
if (err < 0)
return err;
+ chip = card->private_data;
if (spdif_aclink < 0)
spdif_aclink = check_default_spdif_aclink(pci);
@@ -3234,21 +3194,16 @@ static int snd_intel8x0_probe(struct pci_dev *pci,
buggy_irq = 0;
}
- if ((err = snd_intel8x0_create(card, pci, pci_id->driver_data,
- &chip)) < 0) {
- snd_card_free(card);
+ err = snd_intel8x0_init(card, pci, pci_id->driver_data);
+ if (err < 0)
return err;
- }
- card->private_data = chip;
- if ((err = snd_intel8x0_mixer(chip, ac97_clock, ac97_quirk)) < 0) {
- snd_card_free(card);
+ err = snd_intel8x0_mixer(chip, ac97_clock, ac97_quirk);
+ if (err < 0)
return err;
- }
- if ((err = snd_intel8x0_pcm(chip)) < 0) {
- snd_card_free(card);
+ err = snd_intel8x0_pcm(chip);
+ if (err < 0)
return err;
- }
snd_intel8x0_proc_init(chip);
@@ -3265,24 +3220,18 @@ static int snd_intel8x0_probe(struct pci_dev *pci,
}
}
- if ((err = snd_card_register(card)) < 0) {
- snd_card_free(card);
+ err = snd_card_register(card);
+ if (err < 0)
return err;
- }
+
pci_set_drvdata(pci, card);
return 0;
}
-static void snd_intel8x0_remove(struct pci_dev *pci)
-{
- snd_card_free(pci_get_drvdata(pci));
-}
-
static struct pci_driver intel8x0_driver = {
.name = KBUILD_MODNAME,
.id_table = snd_intel8x0_ids,
.probe = snd_intel8x0_probe,
- .remove = snd_intel8x0_remove,
.driver = {
.pm = INTEL8X0_PM_OPS,
},
diff --git a/sound/pci/intel8x0m.c b/sound/pci/intel8x0m.c
index c84629190cba..22fc834f48c0 100644
--- a/sound/pci/intel8x0m.c
+++ b/sound/pci/intel8x0m.c
@@ -212,7 +212,7 @@ struct intel8x0m {
spinlock_t reg_lock;
- struct snd_dma_buffer bdbars;
+ struct snd_dma_buffer *bdbars;
u32 bdbars_count;
u32 int_sta_reg; /* interrupt status register */
u32 int_sta_mask; /* interrupt status mask */
@@ -990,8 +990,9 @@ static int snd_intel8x0m_chip_init(struct intel8x0m *chip, int probing)
return 0;
}
-static int snd_intel8x0m_free(struct intel8x0m *chip)
+static void snd_intel8x0m_free(struct snd_card *card)
{
+ struct intel8x0m *chip = card->private_data;
unsigned int i;
if (chip->irq < 0)
@@ -1005,16 +1006,6 @@ static int snd_intel8x0m_free(struct intel8x0m *chip)
__hw_end:
if (chip->irq >= 0)
free_irq(chip->irq, chip);
- if (chip->bdbars.area)
- snd_dma_free_pages(&chip->bdbars);
- if (chip->addr)
- pci_iounmap(chip->pci, chip->addr);
- if (chip->bmaddr)
- pci_iounmap(chip->pci, chip->bmaddr);
- pci_release_regions(chip->pci);
- pci_disable_device(chip->pci);
- kfree(chip);
- return 0;
}
#ifdef CONFIG_PM_SLEEP
@@ -1093,84 +1084,54 @@ static void snd_intel8x0m_proc_init(struct intel8x0m *chip)
snd_info_set_text_ops(entry, chip, snd_intel8x0m_proc_read);
}
-static int snd_intel8x0m_dev_free(struct snd_device *device)
-{
- struct intel8x0m *chip = device->device_data;
- return snd_intel8x0m_free(chip);
-}
-
struct ich_reg_info {
unsigned int int_sta_mask;
unsigned int offset;
};
-static int snd_intel8x0m_create(struct snd_card *card,
- struct pci_dev *pci,
- unsigned long device_type,
- struct intel8x0m **r_intel8x0m)
+static int snd_intel8x0m_init(struct snd_card *card,
+ struct pci_dev *pci,
+ unsigned long device_type)
{
- struct intel8x0m *chip;
+ struct intel8x0m *chip = card->private_data;
int err;
unsigned int i;
unsigned int int_sta_masks;
struct ichdev *ichdev;
- static struct snd_device_ops ops = {
- .dev_free = snd_intel8x0m_dev_free,
- };
static struct ich_reg_info intel_regs[2] = {
{ ICH_MIINT, 0 },
{ ICH_MOINT, 0x10 },
};
struct ich_reg_info *tbl;
- *r_intel8x0m = NULL;
-
- if ((err = pci_enable_device(pci)) < 0)
+ err = pcim_enable_device(pci);
+ if (err < 0)
return err;
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
- if (chip == NULL) {
- pci_disable_device(pci);
- return -ENOMEM;
- }
spin_lock_init(&chip->reg_lock);
chip->device_type = device_type;
chip->card = card;
chip->pci = pci;
chip->irq = -1;
- if ((err = pci_request_regions(pci, card->shortname)) < 0) {
- kfree(chip);
- pci_disable_device(pci);
+ err = pcim_iomap_regions(pci, -1, card->shortname);
+ if (err < 0)
return err;
- }
if (device_type == DEVICE_ALI) {
/* ALI5455 has no ac97 region */
- chip->bmaddr = pci_iomap(pci, 0, 0);
- goto port_inited;
- }
-
- if (pci_resource_flags(pci, 2) & IORESOURCE_MEM) /* ICH4 and Nforce */
- chip->addr = pci_iomap(pci, 2, 0);
- else
- chip->addr = pci_iomap(pci, 0, 0);
- if (!chip->addr) {
- dev_err(card->dev, "AC'97 space ioremap problem\n");
- snd_intel8x0m_free(chip);
- return -EIO;
- }
- if (pci_resource_flags(pci, 3) & IORESOURCE_MEM) /* ICH4 */
- chip->bmaddr = pci_iomap(pci, 3, 0);
- else
- chip->bmaddr = pci_iomap(pci, 1, 0);
- if (!chip->bmaddr) {
- dev_err(card->dev, "Controller space ioremap problem\n");
- snd_intel8x0m_free(chip);
- return -EIO;
+ chip->bmaddr = pcim_iomap_table(pci)[0];
+ } else {
+ if (pci_resource_flags(pci, 2) & IORESOURCE_MEM) /* ICH4 and Nforce */
+ chip->addr = pcim_iomap_table(pci)[2];
+ else
+ chip->addr = pcim_iomap_table(pci)[0];
+ if (pci_resource_flags(pci, 3) & IORESOURCE_MEM) /* ICH4 */
+ chip->bmaddr = pcim_iomap_table(pci)[3];
+ else
+ chip->bmaddr = pcim_iomap_table(pci)[1];
}
- port_inited:
/* initialize offsets */
chip->bdbars_count = 2;
tbl = intel_regs;
@@ -1196,19 +1157,19 @@ static int snd_intel8x0m_create(struct snd_card *card,
/* allocate buffer descriptor lists */
/* the start of each lists must be aligned to 8 bytes */
- if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
- chip->bdbars_count * sizeof(u32) * ICH_MAX_FRAGS * 2,
- &chip->bdbars) < 0) {
- snd_intel8x0m_free(chip);
+ chip->bdbars = snd_devm_alloc_pages(&pci->dev, SNDRV_DMA_TYPE_DEV,
+ chip->bdbars_count * sizeof(u32) *
+ ICH_MAX_FRAGS * 2);
+ if (IS_ERR(chip->bdbars))
return -ENOMEM;
- }
+
/* tables must be aligned to 8 bytes here, but the kernel pages
are much bigger, so we don't care (on i386) */
int_sta_masks = 0;
for (i = 0; i < chip->bdbars_count; i++) {
ichdev = &chip->ichd[i];
- ichdev->bdbar = ((__le32 *)chip->bdbars.area) + (i * ICH_MAX_FRAGS * 2);
- ichdev->bdbar_addr = chip->bdbars.addr + (i * sizeof(u32) * ICH_MAX_FRAGS * 2);
+ ichdev->bdbar = ((__le32 *)chip->bdbars->area) + (i * ICH_MAX_FRAGS * 2);
+ ichdev->bdbar_addr = chip->bdbars->addr + (i * sizeof(u32) * ICH_MAX_FRAGS * 2);
int_sta_masks |= ichdev->int_sta_mask;
}
chip->int_sta_reg = ICH_REG_GLOB_STA;
@@ -1216,25 +1177,22 @@ static int snd_intel8x0m_create(struct snd_card *card,
pci_set_master(pci);
- if ((err = snd_intel8x0m_chip_init(chip, 1)) < 0) {
- snd_intel8x0m_free(chip);
+ err = snd_intel8x0m_chip_init(chip, 1);
+ if (err < 0)
return err;
- }
+ /* NOTE: we don't use devm version here since it's released /
+ * re-acquired in PM callbacks.
+ * It's released explicitly in snd_intel8x0m_free(), too.
+ */
if (request_irq(pci->irq, snd_intel8x0m_interrupt, IRQF_SHARED,
KBUILD_MODNAME, chip)) {
dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
- snd_intel8x0m_free(chip);
return -EBUSY;
}
chip->irq = pci->irq;
+ card->private_free = snd_intel8x0m_free;
- if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
- snd_intel8x0m_free(chip);
- return err;
- }
-
- *r_intel8x0m = chip;
return 0;
}
@@ -1272,9 +1230,11 @@ static int snd_intel8x0m_probe(struct pci_dev *pci,
int err;
struct shortname_table *name;
- err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
+ err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,
+ sizeof(*chip), &card);
if (err < 0)
return err;
+ chip = card->private_data;
strcpy(card->driver, "ICH-MODEM");
strcpy(card->shortname, "Intel ICH");
@@ -1286,44 +1246,33 @@ static int snd_intel8x0m_probe(struct pci_dev *pci,
}
strcat(card->shortname," Modem");
- if ((err = snd_intel8x0m_create(card, pci, pci_id->driver_data, &chip)) < 0) {
- snd_card_free(card);
+ err = snd_intel8x0m_init(card, pci, pci_id->driver_data);
+ if (err < 0)
return err;
- }
- card->private_data = chip;
- if ((err = snd_intel8x0m_mixer(chip, ac97_clock)) < 0) {
- snd_card_free(card);
+ err = snd_intel8x0m_mixer(chip, ac97_clock);
+ if (err < 0)
return err;
- }
- if ((err = snd_intel8x0m_pcm(chip)) < 0) {
- snd_card_free(card);
+ err = snd_intel8x0m_pcm(chip);
+ if (err < 0)
return err;
- }
snd_intel8x0m_proc_init(chip);
sprintf(card->longname, "%s at irq %i",
card->shortname, chip->irq);
- if ((err = snd_card_register(card)) < 0) {
- snd_card_free(card);
+ err = snd_card_register(card);
+ if (err < 0)
return err;
- }
pci_set_drvdata(pci, card);
return 0;
}
-static void snd_intel8x0m_remove(struct pci_dev *pci)
-{
- snd_card_free(pci_get_drvdata(pci));
-}
-
static struct pci_driver intel8x0m_driver = {
.name = KBUILD_MODNAME,
.id_table = snd_intel8x0m_ids,
.probe = snd_intel8x0m_probe,
- .remove = snd_intel8x0m_remove,
.driver = {
.pm = INTEL8X0M_PM_OPS,
},
--
2.18.0
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